19783201 has 2 divisors, whose sum is σ = 19783202. Its totient is φ = 19783200.

The previous prime is 19783129. The next prime is 19783229. The reversal of 19783201 is 10238791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12082576 + 7700625 = 3476^2 + 2775^2 .

It is an emirp because it is prime and its reverse (10238791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19783201 - 2⁹ = 19782689 is a prime.

It is not a weakly prime, because it can be changed into another prime (19783241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9891600 + 9891601.

It is an arithmetic number, because the mean of its divisors is an integer number (9891601).

Almost surely, 2^19783201 is an apocalyptic number.

It is an amenable number.

19783201 is a deficient number, since it is larger than the sum of its proper divisors (1).

19783201 is an equidigital number, since it uses as much as digits as its factorization.

19783201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 19783201 is about 4447.8310444530. The cubic root of 19783201 is about 270.4573911610.

The spelling of 19783201 in words is "nineteen million, seven hundred eighty-three thousand, two hundred one".